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Habitat Suitability Index Models: Snowshoe Hare, R.G. Carreker
Habitat Suitability Index Models: Snowshoe Hare, R.G. Carreker
USDA Wildlife Services: Staff Publications
This document is part of the Habitat Suitability Index (HSI) Model Series [Biological Report 82(10)] which provides habitat information useful for impact assessment and habitat management. Several types of habitat information are provided. The Habitat Use Information Section is largely constrained to those data that can be used to derive quantitative relationships between key environmental variables and habitat suitability. This information provides the foundation for the HSI model and may be useful in the development of other models more appropriate to specific assessment or evaluation needs. The HSI Model Section documents the habitat model and includes information pertinent to its …
Sex-Specific Feeding Habits Of Brown-Headed Cowbirds In Northern Ohio In January, Richard A. Dolbeer, Cynthia R. Smith
Sex-Specific Feeding Habits Of Brown-Headed Cowbirds In Northern Ohio In January, Richard A. Dolbeer, Cynthia R. Smith
USDA Wildlife Services: Staff Publications
We examined the stomach contents of 57 brown-headed cowbirds (Molothrus ater) collected from a roost in Erie Co., Ohio, on 12 January 1983. Corn was by far the predominant food, averaging 66% of the stomach contents by weight. Seeds from at least five grasses, but primarily Setaria spp., were the second most abundant food category, averaging 21% of the stomach contents. Ragweed {Ambrosia artemisiifolia) seeds (2.6%) were third. Male cowbirds consumed more corn than did the smaller females, whereas females consumed more of the smaller grass seeds. The abundance of corn in harvested fields and feedlots, combined with mild winter …